rlm@46: /*  Prototype JavaScript framework, version 1.4.0
rlm@46:  *  (c) 2005 Sam Stephenson <sam@conio.net>
rlm@46:  *
rlm@46:  *  THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff
rlm@46:  *  against the source tree, available from the Prototype darcs repository.
rlm@46:  *
rlm@46:  *  Prototype is freely distributable under the terms of an MIT-style license.
rlm@46:  *
rlm@46:  *  For details, see the Prototype web site: http://prototype.conio.net/
rlm@46:  *
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: var Prototype = {
rlm@46:   Version: '1.4.0',
rlm@46:   ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
rlm@46: 
rlm@46:   emptyFunction: function() {},
rlm@46:   K: function(x) {return x}
rlm@46: }
rlm@46: 
rlm@46: var Class = {
rlm@46:   create: function() {
rlm@46:     return function() {
rlm@46:       this.initialize.apply(this, arguments);
rlm@46:     }
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: var Abstract = new Object();
rlm@46: 
rlm@46: Object.extend = function(destination, source) {
rlm@46:   for (property in source) {
rlm@46:     destination[property] = source[property];
rlm@46:   }
rlm@46:   return destination;
rlm@46: }
rlm@46: 
rlm@46: Object.inspect = function(object) {
rlm@46:   try {
rlm@46:     if (object == undefined) return 'undefined';
rlm@46:     if (object == null) return 'null';
rlm@46:     return object.inspect ? object.inspect() : object.toString();
rlm@46:   } catch (e) {
rlm@46:     if (e instanceof RangeError) return '...';
rlm@46:     throw e;
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Function.prototype.bind = function() {
rlm@46:   var __method = this, args = $A(arguments), object = args.shift();
rlm@46:   return function() {
rlm@46:     return __method.apply(object, args.concat($A(arguments)));
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Function.prototype.bindAsEventListener = function(object) {
rlm@46:   var __method = this;
rlm@46:   return function(event) {
rlm@46:     return __method.call(object, event || window.event);
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Object.extend(Number.prototype, {
rlm@46:   toColorPart: function() {
rlm@46:     var digits = this.toString(16);
rlm@46:     if (this < 16) return '0' + digits;
rlm@46:     return digits;
rlm@46:   },
rlm@46: 
rlm@46:   succ: function() {
rlm@46:     return this + 1;
rlm@46:   },
rlm@46: 
rlm@46:   times: function(iterator) {
rlm@46:     $R(0, this, true).each(iterator);
rlm@46:     return this;
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: var Try = {
rlm@46:   these: function() {
rlm@46:     var returnValue;
rlm@46: 
rlm@46:     for (var i = 0; i < arguments.length; i++) {
rlm@46:       var lambda = arguments[i];
rlm@46:       try {
rlm@46:         returnValue = lambda();
rlm@46:         break;
rlm@46:       } catch (e) {}
rlm@46:     }
rlm@46: 
rlm@46:     return returnValue;
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: var PeriodicalExecuter = Class.create();
rlm@46: PeriodicalExecuter.prototype = {
rlm@46:   initialize: function(callback, frequency) {
rlm@46:     this.callback = callback;
rlm@46:     this.frequency = frequency;
rlm@46:     this.currentlyExecuting = false;
rlm@46: 
rlm@46:     this.registerCallback();
rlm@46:   },
rlm@46: 
rlm@46:   registerCallback: function() {
rlm@46:     setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
rlm@46:   },
rlm@46: 
rlm@46:   onTimerEvent: function() {
rlm@46:     if (!this.currentlyExecuting) {
rlm@46:       try {
rlm@46:         this.currentlyExecuting = true;
rlm@46:         this.callback();
rlm@46:       } finally {
rlm@46:         this.currentlyExecuting = false;
rlm@46:       }
rlm@46:     }
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: function $() {
rlm@46:   var elements = new Array();
rlm@46: 
rlm@46:   for (var i = 0; i < arguments.length; i++) {
rlm@46:     var element = arguments[i];
rlm@46:     if (typeof element == 'string')
rlm@46:       element = document.getElementById(element);
rlm@46: 
rlm@46:     if (arguments.length == 1)
rlm@46:       return element;
rlm@46: 
rlm@46:     elements.push(element);
rlm@46:   }
rlm@46: 
rlm@46:   return elements;
rlm@46: }
rlm@46: Object.extend(String.prototype, {
rlm@46:   stripTags: function() {
rlm@46:     return this.replace(/<\/?[^>]+>/gi, '');
rlm@46:   },
rlm@46: 
rlm@46:   stripScripts: function() {
rlm@46:     return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
rlm@46:   },
rlm@46: 
rlm@46:   extractScripts: function() {
rlm@46:     var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
rlm@46:     var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
rlm@46:     return (this.match(matchAll) || []).map(function(scriptTag) {
rlm@46:       return (scriptTag.match(matchOne) || ['', ''])[1];
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   evalScripts: function() {
rlm@46:     return this.extractScripts().map(eval);
rlm@46:   },
rlm@46: 
rlm@46:   escapeHTML: function() {
rlm@46:     var div = document.createElement('div');
rlm@46:     var text = document.createTextNode(this);
rlm@46:     div.appendChild(text);
rlm@46:     return div.innerHTML;
rlm@46:   },
rlm@46: 
rlm@46:   unescapeHTML: function() {
rlm@46:     var div = document.createElement('div');
rlm@46:     div.innerHTML = this.stripTags();
rlm@46:     return div.childNodes[0] ? div.childNodes[0].nodeValue : '';
rlm@46:   },
rlm@46: 
rlm@46:   toQueryParams: function() {
rlm@46:     var pairs = this.match(/^\??(.*)$/)[1].split('&');
rlm@46:     return pairs.inject({}, function(params, pairString) {
rlm@46:       var pair = pairString.split('=');
rlm@46:       params[pair[0]] = pair[1];
rlm@46:       return params;
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   toArray: function() {
rlm@46:     return this.split('');
rlm@46:   },
rlm@46: 
rlm@46:   camelize: function() {
rlm@46:     var oStringList = this.split('-');
rlm@46:     if (oStringList.length == 1) return oStringList[0];
rlm@46: 
rlm@46:     var camelizedString = this.indexOf('-') == 0
rlm@46:       ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
rlm@46:       : oStringList[0];
rlm@46: 
rlm@46:     for (var i = 1, len = oStringList.length; i < len; i++) {
rlm@46:       var s = oStringList[i];
rlm@46:       camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
rlm@46:     }
rlm@46: 
rlm@46:     return camelizedString;
rlm@46:   },
rlm@46: 
rlm@46:   inspect: function() {
rlm@46:     return "'" + this.replace('\\', '\\\\').replace("'", '\\\'') + "'";
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: String.prototype.parseQuery = String.prototype.toQueryParams;
rlm@46: 
rlm@46: var $break    = new Object();
rlm@46: var $continue = new Object();
rlm@46: 
rlm@46: var Enumerable = {
rlm@46:   each: function(iterator) {
rlm@46:     var index = 0;
rlm@46:     try {
rlm@46:       this._each(function(value) {
rlm@46:         try {
rlm@46:           iterator(value, index++);
rlm@46:         } catch (e) {
rlm@46:           if (e != $continue) throw e;
rlm@46:         }
rlm@46:       });
rlm@46:     } catch (e) {
rlm@46:       if (e != $break) throw e;
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   all: function(iterator) {
rlm@46:     var result = true;
rlm@46:     this.each(function(value, index) {
rlm@46:       result = result && !!(iterator || Prototype.K)(value, index);
rlm@46:       if (!result) throw $break;
rlm@46:     });
rlm@46:     return result;
rlm@46:   },
rlm@46: 
rlm@46:   any: function(iterator) {
rlm@46:     var result = true;
rlm@46:     this.each(function(value, index) {
rlm@46:       if (result = !!(iterator || Prototype.K)(value, index))
rlm@46:         throw $break;
rlm@46:     });
rlm@46:     return result;
rlm@46:   },
rlm@46: 
rlm@46:   collect: function(iterator) {
rlm@46:     var results = [];
rlm@46:     this.each(function(value, index) {
rlm@46:       results.push(iterator(value, index));
rlm@46:     });
rlm@46:     return results;
rlm@46:   },
rlm@46: 
rlm@46:   detect: function (iterator) {
rlm@46:     var result;
rlm@46:     this.each(function(value, index) {
rlm@46:       if (iterator(value, index)) {
rlm@46:         result = value;
rlm@46:         throw $break;
rlm@46:       }
rlm@46:     });
rlm@46:     return result;
rlm@46:   },
rlm@46: 
rlm@46:   findAll: function(iterator) {
rlm@46:     var results = [];
rlm@46:     this.each(function(value, index) {
rlm@46:       if (iterator(value, index))
rlm@46:         results.push(value);
rlm@46:     });
rlm@46:     return results;
rlm@46:   },
rlm@46: 
rlm@46:   grep: function(pattern, iterator) {
rlm@46:     var results = [];
rlm@46:     this.each(function(value, index) {
rlm@46:       var stringValue = value.toString();
rlm@46:       if (stringValue.match(pattern))
rlm@46:         results.push((iterator || Prototype.K)(value, index));
rlm@46:     })
rlm@46:     return results;
rlm@46:   },
rlm@46: 
rlm@46:   include: function(object) {
rlm@46:     var found = false;
rlm@46:     this.each(function(value) {
rlm@46:       if (value == object) {
rlm@46:         found = true;
rlm@46:         throw $break;
rlm@46:       }
rlm@46:     });
rlm@46:     return found;
rlm@46:   },
rlm@46: 
rlm@46:   inject: function(memo, iterator) {
rlm@46:     this.each(function(value, index) {
rlm@46:       memo = iterator(memo, value, index);
rlm@46:     });
rlm@46:     return memo;
rlm@46:   },
rlm@46: 
rlm@46:   invoke: function(method) {
rlm@46:     var args = $A(arguments).slice(1);
rlm@46:     return this.collect(function(value) {
rlm@46:       return value[method].apply(value, args);
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   max: function(iterator) {
rlm@46:     var result;
rlm@46:     this.each(function(value, index) {
rlm@46:       value = (iterator || Prototype.K)(value, index);
rlm@46:       if (value >= (result || value))
rlm@46:         result = value;
rlm@46:     });
rlm@46:     return result;
rlm@46:   },
rlm@46: 
rlm@46:   min: function(iterator) {
rlm@46:     var result;
rlm@46:     this.each(function(value, index) {
rlm@46:       value = (iterator || Prototype.K)(value, index);
rlm@46:       if (value <= (result || value))
rlm@46:         result = value;
rlm@46:     });
rlm@46:     return result;
rlm@46:   },
rlm@46: 
rlm@46:   partition: function(iterator) {
rlm@46:     var trues = [], falses = [];
rlm@46:     this.each(function(value, index) {
rlm@46:       ((iterator || Prototype.K)(value, index) ?
rlm@46:         trues : falses).push(value);
rlm@46:     });
rlm@46:     return [trues, falses];
rlm@46:   },
rlm@46: 
rlm@46:   pluck: function(property) {
rlm@46:     var results = [];
rlm@46:     this.each(function(value, index) {
rlm@46:       results.push(value[property]);
rlm@46:     });
rlm@46:     return results;
rlm@46:   },
rlm@46: 
rlm@46:   reject: function(iterator) {
rlm@46:     var results = [];
rlm@46:     this.each(function(value, index) {
rlm@46:       if (!iterator(value, index))
rlm@46:         results.push(value);
rlm@46:     });
rlm@46:     return results;
rlm@46:   },
rlm@46: 
rlm@46:   sortBy: function(iterator) {
rlm@46:     return this.collect(function(value, index) {
rlm@46:       return {value: value, criteria: iterator(value, index)};
rlm@46:     }).sort(function(left, right) {
rlm@46:       var a = left.criteria, b = right.criteria;
rlm@46:       return a < b ? -1 : a > b ? 1 : 0;
rlm@46:     }).pluck('value');
rlm@46:   },
rlm@46: 
rlm@46:   toArray: function() {
rlm@46:     return this.collect(Prototype.K);
rlm@46:   },
rlm@46: 
rlm@46:   zip: function() {
rlm@46:     var iterator = Prototype.K, args = $A(arguments);
rlm@46:     if (typeof args.last() == 'function')
rlm@46:       iterator = args.pop();
rlm@46: 
rlm@46:     var collections = [this].concat(args).map($A);
rlm@46:     return this.map(function(value, index) {
rlm@46:       iterator(value = collections.pluck(index));
rlm@46:       return value;
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   inspect: function() {
rlm@46:     return '#<Enumerable:' + this.toArray().inspect() + '>';
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Object.extend(Enumerable, {
rlm@46:   map:     Enumerable.collect,
rlm@46:   find:    Enumerable.detect,
rlm@46:   select:  Enumerable.findAll,
rlm@46:   member:  Enumerable.include,
rlm@46:   entries: Enumerable.toArray
rlm@46: });
rlm@46: var $A = Array.from = function(iterable) {
rlm@46:   if (!iterable) return [];
rlm@46:   if (iterable.toArray) {
rlm@46:     return iterable.toArray();
rlm@46:   } else {
rlm@46:     var results = [];
rlm@46:     for (var i = 0; i < iterable.length; i++)
rlm@46:       results.push(iterable[i]);
rlm@46:     return results;
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Object.extend(Array.prototype, Enumerable);
rlm@46: 
rlm@46: Array.prototype._reverse = Array.prototype.reverse;
rlm@46: 
rlm@46: Object.extend(Array.prototype, {
rlm@46:   _each: function(iterator) {
rlm@46:     for (var i = 0; i < this.length; i++)
rlm@46:       iterator(this[i]);
rlm@46:   },
rlm@46: 
rlm@46:   clear: function() {
rlm@46:     this.length = 0;
rlm@46:     return this;
rlm@46:   },
rlm@46: 
rlm@46:   first: function() {
rlm@46:     return this[0];
rlm@46:   },
rlm@46: 
rlm@46:   last: function() {
rlm@46:     return this[this.length - 1];
rlm@46:   },
rlm@46: 
rlm@46:   compact: function() {
rlm@46:     return this.select(function(value) {
rlm@46:       return value != undefined || value != null;
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   flatten: function() {
rlm@46:     return this.inject([], function(array, value) {
rlm@46:       return array.concat(value.constructor == Array ?
rlm@46:         value.flatten() : [value]);
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   without: function() {
rlm@46:     var values = $A(arguments);
rlm@46:     return this.select(function(value) {
rlm@46:       return !values.include(value);
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   indexOf: function(object) {
rlm@46:     for (var i = 0; i < this.length; i++)
rlm@46:       if (this[i] == object) return i;
rlm@46:     return -1;
rlm@46:   },
rlm@46: 
rlm@46:   reverse: function(inline) {
rlm@46:     return (inline !== false ? this : this.toArray())._reverse();
rlm@46:   },
rlm@46: 
rlm@46:   shift: function() {
rlm@46:     var result = this[0];
rlm@46:     for (var i = 0; i < this.length - 1; i++)
rlm@46:       this[i] = this[i + 1];
rlm@46:     this.length--;
rlm@46:     return result;
rlm@46:   },
rlm@46: 
rlm@46:   inspect: function() {
rlm@46:     return '[' + this.map(Object.inspect).join(', ') + ']';
rlm@46:   }
rlm@46: });
rlm@46: var Hash = {
rlm@46:   _each: function(iterator) {
rlm@46:     for (key in this) {
rlm@46:       var value = this[key];
rlm@46:       if (typeof value == 'function') continue;
rlm@46: 
rlm@46:       var pair = [key, value];
rlm@46:       pair.key = key;
rlm@46:       pair.value = value;
rlm@46:       iterator(pair);
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   keys: function() {
rlm@46:     return this.pluck('key');
rlm@46:   },
rlm@46: 
rlm@46:   values: function() {
rlm@46:     return this.pluck('value');
rlm@46:   },
rlm@46: 
rlm@46:   merge: function(hash) {
rlm@46:     return $H(hash).inject($H(this), function(mergedHash, pair) {
rlm@46:       mergedHash[pair.key] = pair.value;
rlm@46:       return mergedHash;
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   toQueryString: function() {
rlm@46:     return this.map(function(pair) {
rlm@46:       return pair.map(encodeURIComponent).join('=');
rlm@46:     }).join('&');
rlm@46:   },
rlm@46: 
rlm@46:   inspect: function() {
rlm@46:     return '#<Hash:{' + this.map(function(pair) {
rlm@46:       return pair.map(Object.inspect).join(': ');
rlm@46:     }).join(', ') + '}>';
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: function $H(object) {
rlm@46:   var hash = Object.extend({}, object || {});
rlm@46:   Object.extend(hash, Enumerable);
rlm@46:   Object.extend(hash, Hash);
rlm@46:   return hash;
rlm@46: }
rlm@46: ObjectRange = Class.create();
rlm@46: Object.extend(ObjectRange.prototype, Enumerable);
rlm@46: Object.extend(ObjectRange.prototype, {
rlm@46:   initialize: function(start, end, exclusive) {
rlm@46:     this.start = start;
rlm@46:     this.end = end;
rlm@46:     this.exclusive = exclusive;
rlm@46:   },
rlm@46: 
rlm@46:   _each: function(iterator) {
rlm@46:     var value = this.start;
rlm@46:     do {
rlm@46:       iterator(value);
rlm@46:       value = value.succ();
rlm@46:     } while (this.include(value));
rlm@46:   },
rlm@46: 
rlm@46:   include: function(value) {
rlm@46:     if (value < this.start)
rlm@46:       return false;
rlm@46:     if (this.exclusive)
rlm@46:       return value < this.end;
rlm@46:     return value <= this.end;
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: var $R = function(start, end, exclusive) {
rlm@46:   return new ObjectRange(start, end, exclusive);
rlm@46: }
rlm@46: 
rlm@46: var Ajax = {
rlm@46:   getTransport: function() {
rlm@46:     return Try.these(
rlm@46:       function() {return new ActiveXObject('Msxml2.XMLHTTP')},
rlm@46:       function() {return new ActiveXObject('Microsoft.XMLHTTP')},
rlm@46:       function() {return new XMLHttpRequest()}
rlm@46:     ) || false;
rlm@46:   },
rlm@46: 
rlm@46:   activeRequestCount: 0
rlm@46: }
rlm@46: 
rlm@46: Ajax.Responders = {
rlm@46:   responders: [],
rlm@46: 
rlm@46:   _each: function(iterator) {
rlm@46:     this.responders._each(iterator);
rlm@46:   },
rlm@46: 
rlm@46:   register: function(responderToAdd) {
rlm@46:     if (!this.include(responderToAdd))
rlm@46:       this.responders.push(responderToAdd);
rlm@46:   },
rlm@46: 
rlm@46:   unregister: function(responderToRemove) {
rlm@46:     this.responders = this.responders.without(responderToRemove);
rlm@46:   },
rlm@46: 
rlm@46:   dispatch: function(callback, request, transport, json) {
rlm@46:     this.each(function(responder) {
rlm@46:       if (responder[callback] && typeof responder[callback] == 'function') {
rlm@46:         try {
rlm@46:           responder[callback].apply(responder, [request, transport, json]);
rlm@46:         } catch (e) {}
rlm@46:       }
rlm@46:     });
rlm@46:   }
rlm@46: };
rlm@46: 
rlm@46: Object.extend(Ajax.Responders, Enumerable);
rlm@46: 
rlm@46: Ajax.Responders.register({
rlm@46:   onCreate: function() {
rlm@46:     Ajax.activeRequestCount++;
rlm@46:   },
rlm@46: 
rlm@46:   onComplete: function() {
rlm@46:     Ajax.activeRequestCount--;
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Ajax.Base = function() {};
rlm@46: Ajax.Base.prototype = {
rlm@46:   setOptions: function(options) {
rlm@46:     this.options = {
rlm@46:       method:       'post',
rlm@46:       asynchronous: true,
rlm@46:       parameters:   ''
rlm@46:     }
rlm@46:     Object.extend(this.options, options || {});
rlm@46:   },
rlm@46: 
rlm@46:   responseIsSuccess: function() {
rlm@46:     return this.transport.status == undefined
rlm@46:         || this.transport.status == 0
rlm@46:         || (this.transport.status >= 200 && this.transport.status < 300);
rlm@46:   },
rlm@46: 
rlm@46:   responseIsFailure: function() {
rlm@46:     return !this.responseIsSuccess();
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Ajax.Request = Class.create();
rlm@46: Ajax.Request.Events =
rlm@46:   ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
rlm@46: 
rlm@46: Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
rlm@46:   initialize: function(url, options) {
rlm@46:     this.transport = Ajax.getTransport();
rlm@46:     this.setOptions(options);
rlm@46:     this.request(url);
rlm@46:   },
rlm@46: 
rlm@46:   request: function(url) {
rlm@46:     var parameters = this.options.parameters || '';
rlm@46:     if (parameters.length > 0) parameters += '&_=';
rlm@46: 
rlm@46:     try {
rlm@46:       this.url = url;
rlm@46:       if (this.options.method == 'get' && parameters.length > 0)
rlm@46:         this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
rlm@46: 
rlm@46:       Ajax.Responders.dispatch('onCreate', this, this.transport);
rlm@46: 
rlm@46:       this.transport.open(this.options.method, this.url,
rlm@46:         this.options.asynchronous);
rlm@46: 
rlm@46:       if (this.options.asynchronous) {
rlm@46:         this.transport.onreadystatechange = this.onStateChange.bind(this);
rlm@46:         setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
rlm@46:       }
rlm@46: 
rlm@46:       this.setRequestHeaders();
rlm@46: 
rlm@46:       var body = this.options.postBody ? this.options.postBody : parameters;
rlm@46:       this.transport.send(this.options.method == 'post' ? body : null);
rlm@46: 
rlm@46:     } catch (e) {
rlm@46:       this.dispatchException(e);
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   setRequestHeaders: function() {
rlm@46:     var requestHeaders =
rlm@46:       ['X-Requested-With', 'XMLHttpRequest',
rlm@46:        'X-Prototype-Version', Prototype.Version];
rlm@46: 
rlm@46:     if (this.options.method == 'post') {
rlm@46:       requestHeaders.push('Content-type',
rlm@46:         'application/x-www-form-urlencoded');
rlm@46: 
rlm@46:       /* Force "Connection: close" for Mozilla browsers to work around
rlm@46:        * a bug where XMLHttpReqeuest sends an incorrect Content-length
rlm@46:        * header. See Mozilla Bugzilla #246651.
rlm@46:        */
rlm@46:       if (this.transport.overrideMimeType)
rlm@46:         requestHeaders.push('Connection', 'close');
rlm@46:     }
rlm@46: 
rlm@46:     if (this.options.requestHeaders)
rlm@46:       requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
rlm@46: 
rlm@46:     for (var i = 0; i < requestHeaders.length; i += 2)
rlm@46:       this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
rlm@46:   },
rlm@46: 
rlm@46:   onStateChange: function() {
rlm@46:     var readyState = this.transport.readyState;
rlm@46:     if (readyState != 1)
rlm@46:       this.respondToReadyState(this.transport.readyState);
rlm@46:   },
rlm@46: 
rlm@46:   header: function(name) {
rlm@46:     try {
rlm@46:       return this.transport.getResponseHeader(name);
rlm@46:     } catch (e) {}
rlm@46:   },
rlm@46: 
rlm@46:   evalJSON: function() {
rlm@46:     try {
rlm@46:       return eval(this.header('X-JSON'));
rlm@46:     } catch (e) {}
rlm@46:   },
rlm@46: 
rlm@46:   evalResponse: function() {
rlm@46:     try {
rlm@46:       return eval(this.transport.responseText);
rlm@46:     } catch (e) {
rlm@46:       this.dispatchException(e);
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   respondToReadyState: function(readyState) {
rlm@46:     var event = Ajax.Request.Events[readyState];
rlm@46:     var transport = this.transport, json = this.evalJSON();
rlm@46: 
rlm@46:     if (event == 'Complete') {
rlm@46:       try {
rlm@46:         (this.options['on' + this.transport.status]
rlm@46:          || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
rlm@46:          || Prototype.emptyFunction)(transport, json);
rlm@46:       } catch (e) {
rlm@46:         this.dispatchException(e);
rlm@46:       }
rlm@46: 
rlm@46:       if ((this.header('Content-type') || '').match(/^text\/javascript/i))
rlm@46:         this.evalResponse();
rlm@46:     }
rlm@46: 
rlm@46:     try {
rlm@46:       (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
rlm@46:       Ajax.Responders.dispatch('on' + event, this, transport, json);
rlm@46:     } catch (e) {
rlm@46:       this.dispatchException(e);
rlm@46:     }
rlm@46: 
rlm@46:     /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
rlm@46:     if (event == 'Complete')
rlm@46:       this.transport.onreadystatechange = Prototype.emptyFunction;
rlm@46:   },
rlm@46: 
rlm@46:   dispatchException: function(exception) {
rlm@46:     (this.options.onException || Prototype.emptyFunction)(this, exception);
rlm@46:     Ajax.Responders.dispatch('onException', this, exception);
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Ajax.Updater = Class.create();
rlm@46: 
rlm@46: Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
rlm@46:   initialize: function(container, url, options) {
rlm@46:     this.containers = {
rlm@46:       success: container.success ? $(container.success) : $(container),
rlm@46:       failure: container.failure ? $(container.failure) :
rlm@46:         (container.success ? null : $(container))
rlm@46:     }
rlm@46: 
rlm@46:     this.transport = Ajax.getTransport();
rlm@46:     this.setOptions(options);
rlm@46: 
rlm@46:     var onComplete = this.options.onComplete || Prototype.emptyFunction;
rlm@46:     this.options.onComplete = (function(transport, object) {
rlm@46:       this.updateContent();
rlm@46:       onComplete(transport, object);
rlm@46:     }).bind(this);
rlm@46: 
rlm@46:     this.request(url);
rlm@46:   },
rlm@46: 
rlm@46:   updateContent: function() {
rlm@46:     var receiver = this.responseIsSuccess() ?
rlm@46:       this.containers.success : this.containers.failure;
rlm@46:     var response = this.transport.responseText;
rlm@46: 
rlm@46:     if (!this.options.evalScripts)
rlm@46:       response = response.stripScripts();
rlm@46: 
rlm@46:     if (receiver) {
rlm@46:       if (this.options.insertion) {
rlm@46:         new this.options.insertion(receiver, response);
rlm@46:       } else {
rlm@46:         Element.update(receiver, response);
rlm@46:       }
rlm@46:     }
rlm@46: 
rlm@46:     if (this.responseIsSuccess()) {
rlm@46:       if (this.onComplete)
rlm@46:         setTimeout(this.onComplete.bind(this), 10);
rlm@46:     }
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Ajax.PeriodicalUpdater = Class.create();
rlm@46: Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
rlm@46:   initialize: function(container, url, options) {
rlm@46:     this.setOptions(options);
rlm@46:     this.onComplete = this.options.onComplete;
rlm@46: 
rlm@46:     this.frequency = (this.options.frequency || 2);
rlm@46:     this.decay = (this.options.decay || 1);
rlm@46: 
rlm@46:     this.updater = {};
rlm@46:     this.container = container;
rlm@46:     this.url = url;
rlm@46: 
rlm@46:     this.start();
rlm@46:   },
rlm@46: 
rlm@46:   start: function() {
rlm@46:     this.options.onComplete = this.updateComplete.bind(this);
rlm@46:     this.onTimerEvent();
rlm@46:   },
rlm@46: 
rlm@46:   stop: function() {
rlm@46:     this.updater.onComplete = undefined;
rlm@46:     clearTimeout(this.timer);
rlm@46:     (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
rlm@46:   },
rlm@46: 
rlm@46:   updateComplete: function(request) {
rlm@46:     if (this.options.decay) {
rlm@46:       this.decay = (request.responseText == this.lastText ?
rlm@46:         this.decay * this.options.decay : 1);
rlm@46: 
rlm@46:       this.lastText = request.responseText;
rlm@46:     }
rlm@46:     this.timer = setTimeout(this.onTimerEvent.bind(this),
rlm@46:       this.decay * this.frequency * 1000);
rlm@46:   },
rlm@46: 
rlm@46:   onTimerEvent: function() {
rlm@46:     this.updater = new Ajax.Updater(this.container, this.url, this.options);
rlm@46:   }
rlm@46: });
rlm@46: document.getElementsByClassName = function(className, parentElement) {
rlm@46:   var children = ($(parentElement) || document.body).getElementsByTagName('*');
rlm@46:   return $A(children).inject([], function(elements, child) {
rlm@46:     if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
rlm@46:       elements.push(child);
rlm@46:     return elements;
rlm@46:   });
rlm@46: }
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: if (!window.Element) {
rlm@46:   var Element = new Object();
rlm@46: }
rlm@46: 
rlm@46: Object.extend(Element, {
rlm@46:   visible: function(element) {
rlm@46:     return $(element).style.display != 'none';
rlm@46:   },
rlm@46: 
rlm@46:   toggle: function() {
rlm@46:     for (var i = 0; i < arguments.length; i++) {
rlm@46:       var element = $(arguments[i]);
rlm@46:       Element[Element.visible(element) ? 'hide' : 'show'](element);
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   hide: function() {
rlm@46:     for (var i = 0; i < arguments.length; i++) {
rlm@46:       var element = $(arguments[i]);
rlm@46:       element.style.display = 'none';
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   show: function() {
rlm@46:     for (var i = 0; i < arguments.length; i++) {
rlm@46:       var element = $(arguments[i]);
rlm@46:       element.style.display = '';
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   remove: function(element) {
rlm@46:     element = $(element);
rlm@46:     element.parentNode.removeChild(element);
rlm@46:   },
rlm@46: 
rlm@46:   update: function(element, html) {
rlm@46:     $(element).innerHTML = html.stripScripts();
rlm@46:     setTimeout(function() {html.evalScripts()}, 10);
rlm@46:   },
rlm@46: 
rlm@46:   getHeight: function(element) {
rlm@46:     element = $(element);
rlm@46:     return element.offsetHeight;
rlm@46:   },
rlm@46: 
rlm@46:   classNames: function(element) {
rlm@46:     return new Element.ClassNames(element);
rlm@46:   },
rlm@46: 
rlm@46:   hasClassName: function(element, className) {
rlm@46:     if (!(element = $(element))) return;
rlm@46:     return Element.classNames(element).include(className);
rlm@46:   },
rlm@46: 
rlm@46:   addClassName: function(element, className) {
rlm@46:     if (!(element = $(element))) return;
rlm@46:     return Element.classNames(element).add(className);
rlm@46:   },
rlm@46: 
rlm@46:   removeClassName: function(element, className) {
rlm@46:     if (!(element = $(element))) return;
rlm@46:     return Element.classNames(element).remove(className);
rlm@46:   },
rlm@46: 
rlm@46:   // removes whitespace-only text node children
rlm@46:   cleanWhitespace: function(element) {
rlm@46:     element = $(element);
rlm@46:     for (var i = 0; i < element.childNodes.length; i++) {
rlm@46:       var node = element.childNodes[i];
rlm@46:       if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
rlm@46:         Element.remove(node);
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   empty: function(element) {
rlm@46:     return $(element).innerHTML.match(/^\s*$/);
rlm@46:   },
rlm@46: 
rlm@46:   scrollTo: function(element) {
rlm@46:     element = $(element);
rlm@46:     var x = element.x ? element.x : element.offsetLeft,
rlm@46:         y = element.y ? element.y : element.offsetTop;
rlm@46:     window.scrollTo(x, y);
rlm@46:   },
rlm@46: 
rlm@46:   getStyle: function(element, style) {
rlm@46:     element = $(element);
rlm@46:     var value = element.style[style.camelize()];
rlm@46:     if (!value) {
rlm@46:       if (document.defaultView && document.defaultView.getComputedStyle) {
rlm@46:         var css = document.defaultView.getComputedStyle(element, null);
rlm@46:         value = css ? css.getPropertyValue(style) : null;
rlm@46:       } else if (element.currentStyle) {
rlm@46:         value = element.currentStyle[style.camelize()];
rlm@46:       }
rlm@46:     }
rlm@46: 
rlm@46:     if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
rlm@46:       if (Element.getStyle(element, 'position') == 'static') value = 'auto';
rlm@46: 
rlm@46:     return value == 'auto' ? null : value;
rlm@46:   },
rlm@46: 
rlm@46:   setStyle: function(element, style) {
rlm@46:     element = $(element);
rlm@46:     for (name in style)
rlm@46:       element.style[name.camelize()] = style[name];
rlm@46:   },
rlm@46: 
rlm@46:   getDimensions: function(element) {
rlm@46:     element = $(element);
rlm@46:     if (Element.getStyle(element, 'display') != 'none')
rlm@46:       return {width: element.offsetWidth, height: element.offsetHeight};
rlm@46: 
rlm@46:     // All *Width and *Height properties give 0 on elements with display none,
rlm@46:     // so enable the element temporarily
rlm@46:     var els = element.style;
rlm@46:     var originalVisibility = els.visibility;
rlm@46:     var originalPosition = els.position;
rlm@46:     els.visibility = 'hidden';
rlm@46:     els.position = 'absolute';
rlm@46:     els.display = '';
rlm@46:     var originalWidth = element.clientWidth;
rlm@46:     var originalHeight = element.clientHeight;
rlm@46:     els.display = 'none';
rlm@46:     els.position = originalPosition;
rlm@46:     els.visibility = originalVisibility;
rlm@46:     return {width: originalWidth, height: originalHeight};
rlm@46:   },
rlm@46: 
rlm@46:   makePositioned: function(element) {
rlm@46:     element = $(element);
rlm@46:     var pos = Element.getStyle(element, 'position');
rlm@46:     if (pos == 'static' || !pos) {
rlm@46:       element._madePositioned = true;
rlm@46:       element.style.position = 'relative';
rlm@46:       // Opera returns the offset relative to the positioning context, when an
rlm@46:       // element is position relative but top and left have not been defined
rlm@46:       if (window.opera) {
rlm@46:         element.style.top = 0;
rlm@46:         element.style.left = 0;
rlm@46:       }
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   undoPositioned: function(element) {
rlm@46:     element = $(element);
rlm@46:     if (element._madePositioned) {
rlm@46:       element._madePositioned = undefined;
rlm@46:       element.style.position =
rlm@46:         element.style.top =
rlm@46:         element.style.left =
rlm@46:         element.style.bottom =
rlm@46:         element.style.right = '';
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   makeClipping: function(element) {
rlm@46:     element = $(element);
rlm@46:     if (element._overflow) return;
rlm@46:     element._overflow = element.style.overflow;
rlm@46:     if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
rlm@46:       element.style.overflow = 'hidden';
rlm@46:   },
rlm@46: 
rlm@46:   undoClipping: function(element) {
rlm@46:     element = $(element);
rlm@46:     if (element._overflow) return;
rlm@46:     element.style.overflow = element._overflow;
rlm@46:     element._overflow = undefined;
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: var Toggle = new Object();
rlm@46: Toggle.display = Element.toggle;
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: Abstract.Insertion = function(adjacency) {
rlm@46:   this.adjacency = adjacency;
rlm@46: }
rlm@46: 
rlm@46: Abstract.Insertion.prototype = {
rlm@46:   initialize: function(element, content) {
rlm@46:     this.element = $(element);
rlm@46:     this.content = content.stripScripts();
rlm@46: 
rlm@46:     if (this.adjacency && this.element.insertAdjacentHTML) {
rlm@46:       try {
rlm@46:         this.element.insertAdjacentHTML(this.adjacency, this.content);
rlm@46:       } catch (e) {
rlm@46:         if (this.element.tagName.toLowerCase() == 'tbody') {
rlm@46:           this.insertContent(this.contentFromAnonymousTable());
rlm@46:         } else {
rlm@46:           throw e;
rlm@46:         }
rlm@46:       }
rlm@46:     } else {
rlm@46:       this.range = this.element.ownerDocument.createRange();
rlm@46:       if (this.initializeRange) this.initializeRange();
rlm@46:       this.insertContent([this.range.createContextualFragment(this.content)]);
rlm@46:     }
rlm@46: 
rlm@46:     setTimeout(function() {content.evalScripts()}, 10);
rlm@46:   },
rlm@46: 
rlm@46:   contentFromAnonymousTable: function() {
rlm@46:     var div = document.createElement('div');
rlm@46:     div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
rlm@46:     return $A(div.childNodes[0].childNodes[0].childNodes);
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: var Insertion = new Object();
rlm@46: 
rlm@46: Insertion.Before = Class.create();
rlm@46: Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
rlm@46:   initializeRange: function() {
rlm@46:     this.range.setStartBefore(this.element);
rlm@46:   },
rlm@46: 
rlm@46:   insertContent: function(fragments) {
rlm@46:     fragments.each((function(fragment) {
rlm@46:       this.element.parentNode.insertBefore(fragment, this.element);
rlm@46:     }).bind(this));
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Insertion.Top = Class.create();
rlm@46: Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
rlm@46:   initializeRange: function() {
rlm@46:     this.range.selectNodeContents(this.element);
rlm@46:     this.range.collapse(true);
rlm@46:   },
rlm@46: 
rlm@46:   insertContent: function(fragments) {
rlm@46:     fragments.reverse(false).each((function(fragment) {
rlm@46:       this.element.insertBefore(fragment, this.element.firstChild);
rlm@46:     }).bind(this));
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Insertion.Bottom = Class.create();
rlm@46: Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
rlm@46:   initializeRange: function() {
rlm@46:     this.range.selectNodeContents(this.element);
rlm@46:     this.range.collapse(this.element);
rlm@46:   },
rlm@46: 
rlm@46:   insertContent: function(fragments) {
rlm@46:     fragments.each((function(fragment) {
rlm@46:       this.element.appendChild(fragment);
rlm@46:     }).bind(this));
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Insertion.After = Class.create();
rlm@46: Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
rlm@46:   initializeRange: function() {
rlm@46:     this.range.setStartAfter(this.element);
rlm@46:   },
rlm@46: 
rlm@46:   insertContent: function(fragments) {
rlm@46:     fragments.each((function(fragment) {
rlm@46:       this.element.parentNode.insertBefore(fragment,
rlm@46:         this.element.nextSibling);
rlm@46:     }).bind(this));
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: Element.ClassNames = Class.create();
rlm@46: Element.ClassNames.prototype = {
rlm@46:   initialize: function(element) {
rlm@46:     this.element = $(element);
rlm@46:   },
rlm@46: 
rlm@46:   _each: function(iterator) {
rlm@46:     this.element.className.split(/\s+/).select(function(name) {
rlm@46:       return name.length > 0;
rlm@46:     })._each(iterator);
rlm@46:   },
rlm@46: 
rlm@46:   set: function(className) {
rlm@46:     this.element.className = className;
rlm@46:   },
rlm@46: 
rlm@46:   add: function(classNameToAdd) {
rlm@46:     if (this.include(classNameToAdd)) return;
rlm@46:     this.set(this.toArray().concat(classNameToAdd).join(' '));
rlm@46:   },
rlm@46: 
rlm@46:   remove: function(classNameToRemove) {
rlm@46:     if (!this.include(classNameToRemove)) return;
rlm@46:     this.set(this.select(function(className) {
rlm@46:       return className != classNameToRemove;
rlm@46:     }).join(' '));
rlm@46:   },
rlm@46: 
rlm@46:   toString: function() {
rlm@46:     return this.toArray().join(' ');
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Object.extend(Element.ClassNames.prototype, Enumerable);
rlm@46: var Field = {
rlm@46:   clear: function() {
rlm@46:     for (var i = 0; i < arguments.length; i++)
rlm@46:       $(arguments[i]).value = '';
rlm@46:   },
rlm@46: 
rlm@46:   focus: function(element) {
rlm@46:     $(element).focus();
rlm@46:   },
rlm@46: 
rlm@46:   present: function() {
rlm@46:     for (var i = 0; i < arguments.length; i++)
rlm@46:       if ($(arguments[i]).value == '') return false;
rlm@46:     return true;
rlm@46:   },
rlm@46: 
rlm@46:   select: function(element) {
rlm@46:     $(element).select();
rlm@46:   },
rlm@46: 
rlm@46:   activate: function(element) {
rlm@46:     element = $(element);
rlm@46:     element.focus();
rlm@46:     if (element.select)
rlm@46:       element.select();
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: var Form = {
rlm@46:   serialize: function(form) {
rlm@46:     var elements = Form.getElements($(form));
rlm@46:     var queryComponents = new Array();
rlm@46: 
rlm@46:     for (var i = 0; i < elements.length; i++) {
rlm@46:       var queryComponent = Form.Element.serialize(elements[i]);
rlm@46:       if (queryComponent)
rlm@46:         queryComponents.push(queryComponent);
rlm@46:     }
rlm@46: 
rlm@46:     return queryComponents.join('&');
rlm@46:   },
rlm@46: 
rlm@46:   getElements: function(form) {
rlm@46:     form = $(form);
rlm@46:     var elements = new Array();
rlm@46: 
rlm@46:     for (tagName in Form.Element.Serializers) {
rlm@46:       var tagElements = form.getElementsByTagName(tagName);
rlm@46:       for (var j = 0; j < tagElements.length; j++)
rlm@46:         elements.push(tagElements[j]);
rlm@46:     }
rlm@46:     return elements;
rlm@46:   },
rlm@46: 
rlm@46:   getInputs: function(form, typeName, name) {
rlm@46:     form = $(form);
rlm@46:     var inputs = form.getElementsByTagName('input');
rlm@46: 
rlm@46:     if (!typeName && !name)
rlm@46:       return inputs;
rlm@46: 
rlm@46:     var matchingInputs = new Array();
rlm@46:     for (var i = 0; i < inputs.length; i++) {
rlm@46:       var input = inputs[i];
rlm@46:       if ((typeName && input.type != typeName) ||
rlm@46:           (name && input.name != name))
rlm@46:         continue;
rlm@46:       matchingInputs.push(input);
rlm@46:     }
rlm@46: 
rlm@46:     return matchingInputs;
rlm@46:   },
rlm@46: 
rlm@46:   disable: function(form) {
rlm@46:     var elements = Form.getElements(form);
rlm@46:     for (var i = 0; i < elements.length; i++) {
rlm@46:       var element = elements[i];
rlm@46:       element.blur();
rlm@46:       element.disabled = 'true';
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   enable: function(form) {
rlm@46:     var elements = Form.getElements(form);
rlm@46:     for (var i = 0; i < elements.length; i++) {
rlm@46:       var element = elements[i];
rlm@46:       element.disabled = '';
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   findFirstElement: function(form) {
rlm@46:     return Form.getElements(form).find(function(element) {
rlm@46:       return element.type != 'hidden' && !element.disabled &&
rlm@46:         ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
rlm@46:     });
rlm@46:   },
rlm@46: 
rlm@46:   focusFirstElement: function(form) {
rlm@46:     Field.activate(Form.findFirstElement(form));
rlm@46:   },
rlm@46: 
rlm@46:   reset: function(form) {
rlm@46:     $(form).reset();
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Form.Element = {
rlm@46:   serialize: function(element) {
rlm@46:     element = $(element);
rlm@46:     var method = element.tagName.toLowerCase();
rlm@46:     var parameter = Form.Element.Serializers[method](element);
rlm@46: 
rlm@46:     if (parameter) {
rlm@46:       var key = encodeURIComponent(parameter[0]);
rlm@46:       if (key.length == 0) return;
rlm@46: 
rlm@46:       if (parameter[1].constructor != Array)
rlm@46:         parameter[1] = [parameter[1]];
rlm@46: 
rlm@46:       return parameter[1].map(function(value) {
rlm@46:         return key + '=' + encodeURIComponent(value);
rlm@46:       }).join('&');
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   getValue: function(element) {
rlm@46:     element = $(element);
rlm@46:     var method = element.tagName.toLowerCase();
rlm@46:     var parameter = Form.Element.Serializers[method](element);
rlm@46: 
rlm@46:     if (parameter)
rlm@46:       return parameter[1];
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Form.Element.Serializers = {
rlm@46:   input: function(element) {
rlm@46:     switch (element.type.toLowerCase()) {
rlm@46:       case 'submit':
rlm@46:       case 'hidden':
rlm@46:       case 'password':
rlm@46:       case 'text':
rlm@46:         return Form.Element.Serializers.textarea(element);
rlm@46:       case 'checkbox':
rlm@46:       case 'radio':
rlm@46:         return Form.Element.Serializers.inputSelector(element);
rlm@46:     }
rlm@46:     return false;
rlm@46:   },
rlm@46: 
rlm@46:   inputSelector: function(element) {
rlm@46:     if (element.checked)
rlm@46:       return [element.name, element.value];
rlm@46:   },
rlm@46: 
rlm@46:   textarea: function(element) {
rlm@46:     return [element.name, element.value];
rlm@46:   },
rlm@46: 
rlm@46:   select: function(element) {
rlm@46:     return Form.Element.Serializers[element.type == 'select-one' ?
rlm@46:       'selectOne' : 'selectMany'](element);
rlm@46:   },
rlm@46: 
rlm@46:   selectOne: function(element) {
rlm@46:     var value = '', opt, index = element.selectedIndex;
rlm@46:     if (index >= 0) {
rlm@46:       opt = element.options[index];
rlm@46:       value = opt.value;
rlm@46:       if (!value && !('value' in opt))
rlm@46:         value = opt.text;
rlm@46:     }
rlm@46:     return [element.name, value];
rlm@46:   },
rlm@46: 
rlm@46:   selectMany: function(element) {
rlm@46:     var value = new Array();
rlm@46:     for (var i = 0; i < element.length; i++) {
rlm@46:       var opt = element.options[i];
rlm@46:       if (opt.selected) {
rlm@46:         var optValue = opt.value;
rlm@46:         if (!optValue && !('value' in opt))
rlm@46:           optValue = opt.text;
rlm@46:         value.push(optValue);
rlm@46:       }
rlm@46:     }
rlm@46:     return [element.name, value];
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: var $F = Form.Element.getValue;
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: Abstract.TimedObserver = function() {}
rlm@46: Abstract.TimedObserver.prototype = {
rlm@46:   initialize: function(element, frequency, callback) {
rlm@46:     this.frequency = frequency;
rlm@46:     this.element   = $(element);
rlm@46:     this.callback  = callback;
rlm@46: 
rlm@46:     this.lastValue = this.getValue();
rlm@46:     this.registerCallback();
rlm@46:   },
rlm@46: 
rlm@46:   registerCallback: function() {
rlm@46:     setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
rlm@46:   },
rlm@46: 
rlm@46:   onTimerEvent: function() {
rlm@46:     var value = this.getValue();
rlm@46:     if (this.lastValue != value) {
rlm@46:       this.callback(this.element, value);
rlm@46:       this.lastValue = value;
rlm@46:     }
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Form.Element.Observer = Class.create();
rlm@46: Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
rlm@46:   getValue: function() {
rlm@46:     return Form.Element.getValue(this.element);
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Form.Observer = Class.create();
rlm@46: Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
rlm@46:   getValue: function() {
rlm@46:     return Form.serialize(this.element);
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: /*--------------------------------------------------------------------------*/
rlm@46: 
rlm@46: Abstract.EventObserver = function() {}
rlm@46: Abstract.EventObserver.prototype = {
rlm@46:   initialize: function(element, callback) {
rlm@46:     this.element  = $(element);
rlm@46:     this.callback = callback;
rlm@46: 
rlm@46:     this.lastValue = this.getValue();
rlm@46:     if (this.element.tagName.toLowerCase() == 'form')
rlm@46:       this.registerFormCallbacks();
rlm@46:     else
rlm@46:       this.registerCallback(this.element);
rlm@46:   },
rlm@46: 
rlm@46:   onElementEvent: function() {
rlm@46:     var value = this.getValue();
rlm@46:     if (this.lastValue != value) {
rlm@46:       this.callback(this.element, value);
rlm@46:       this.lastValue = value;
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   registerFormCallbacks: function() {
rlm@46:     var elements = Form.getElements(this.element);
rlm@46:     for (var i = 0; i < elements.length; i++)
rlm@46:       this.registerCallback(elements[i]);
rlm@46:   },
rlm@46: 
rlm@46:   registerCallback: function(element) {
rlm@46:     if (element.type) {
rlm@46:       switch (element.type.toLowerCase()) {
rlm@46:         case 'checkbox':
rlm@46:         case 'radio':
rlm@46:           Event.observe(element, 'click', this.onElementEvent.bind(this));
rlm@46:           break;
rlm@46:         case 'password':
rlm@46:         case 'text':
rlm@46:         case 'textarea':
rlm@46:         case 'select-one':
rlm@46:         case 'select-multiple':
rlm@46:           Event.observe(element, 'change', this.onElementEvent.bind(this));
rlm@46:           break;
rlm@46:       }
rlm@46:     }
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: Form.Element.EventObserver = Class.create();
rlm@46: Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
rlm@46:   getValue: function() {
rlm@46:     return Form.Element.getValue(this.element);
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: Form.EventObserver = Class.create();
rlm@46: Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
rlm@46:   getValue: function() {
rlm@46:     return Form.serialize(this.element);
rlm@46:   }
rlm@46: });
rlm@46: if (!window.Event) {
rlm@46:   var Event = new Object();
rlm@46: }
rlm@46: 
rlm@46: Object.extend(Event, {
rlm@46:   KEY_BACKSPACE: 8,
rlm@46:   KEY_TAB:       9,
rlm@46:   KEY_RETURN:   13,
rlm@46:   KEY_ESC:      27,
rlm@46:   KEY_LEFT:     37,
rlm@46:   KEY_UP:       38,
rlm@46:   KEY_RIGHT:    39,
rlm@46:   KEY_DOWN:     40,
rlm@46:   KEY_DELETE:   46,
rlm@46: 
rlm@46:   element: function(event) {
rlm@46:     return event.target || event.srcElement;
rlm@46:   },
rlm@46: 
rlm@46:   isLeftClick: function(event) {
rlm@46:     return (((event.which) && (event.which == 1)) ||
rlm@46:             ((event.button) && (event.button == 1)));
rlm@46:   },
rlm@46: 
rlm@46:   pointerX: function(event) {
rlm@46:     return event.pageX || (event.clientX +
rlm@46:       (document.documentElement.scrollLeft || document.body.scrollLeft));
rlm@46:   },
rlm@46: 
rlm@46:   pointerY: function(event) {
rlm@46:     return event.pageY || (event.clientY +
rlm@46:       (document.documentElement.scrollTop || document.body.scrollTop));
rlm@46:   },
rlm@46: 
rlm@46:   stop: function(event) {
rlm@46:     if (event.preventDefault) {
rlm@46:       event.preventDefault();
rlm@46:       event.stopPropagation();
rlm@46:     } else {
rlm@46:       event.returnValue = false;
rlm@46:       event.cancelBubble = true;
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   // find the first node with the given tagName, starting from the
rlm@46:   // node the event was triggered on; traverses the DOM upwards
rlm@46:   findElement: function(event, tagName) {
rlm@46:     var element = Event.element(event);
rlm@46:     while (element.parentNode && (!element.tagName ||
rlm@46:         (element.tagName.toUpperCase() != tagName.toUpperCase())))
rlm@46:       element = element.parentNode;
rlm@46:     return element;
rlm@46:   },
rlm@46: 
rlm@46:   observers: false,
rlm@46: 
rlm@46:   _observeAndCache: function(element, name, observer, useCapture) {
rlm@46:     if (!this.observers) this.observers = [];
rlm@46:     if (element.addEventListener) {
rlm@46:       this.observers.push([element, name, observer, useCapture]);
rlm@46:       element.addEventListener(name, observer, useCapture);
rlm@46:     } else if (element.attachEvent) {
rlm@46:       this.observers.push([element, name, observer, useCapture]);
rlm@46:       element.attachEvent('on' + name, observer);
rlm@46:     }
rlm@46:   },
rlm@46: 
rlm@46:   unloadCache: function() {
rlm@46:     if (!Event.observers) return;
rlm@46:     for (var i = 0; i < Event.observers.length; i++) {
rlm@46:       Event.stopObserving.apply(this, Event.observers[i]);
rlm@46:       Event.observers[i][0] = null;
rlm@46:     }
rlm@46:     Event.observers = false;
rlm@46:   },
rlm@46: 
rlm@46:   observe: function(element, name, observer, useCapture) {
rlm@46:     var element = $(element);
rlm@46:     useCapture = useCapture || false;
rlm@46: 
rlm@46:     if (name == 'keypress' &&
rlm@46:         (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
rlm@46:         || element.attachEvent))
rlm@46:       name = 'keydown';
rlm@46: 
rlm@46:     this._observeAndCache(element, name, observer, useCapture);
rlm@46:   },
rlm@46: 
rlm@46:   stopObserving: function(element, name, observer, useCapture) {
rlm@46:     var element = $(element);
rlm@46:     useCapture = useCapture || false;
rlm@46: 
rlm@46:     if (name == 'keypress' &&
rlm@46:         (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
rlm@46:         || element.detachEvent))
rlm@46:       name = 'keydown';
rlm@46: 
rlm@46:     if (element.removeEventListener) {
rlm@46:       element.removeEventListener(name, observer, useCapture);
rlm@46:     } else if (element.detachEvent) {
rlm@46:       element.detachEvent('on' + name, observer);
rlm@46:     }
rlm@46:   }
rlm@46: });
rlm@46: 
rlm@46: /* prevent memory leaks in IE */
rlm@46: Event.observe(window, 'unload', Event.unloadCache, false);
rlm@46: var Position = {
rlm@46:   // set to true if needed, warning: firefox performance problems
rlm@46:   // NOT neeeded for page scrolling, only if draggable contained in
rlm@46:   // scrollable elements
rlm@46:   includeScrollOffsets: false,
rlm@46: 
rlm@46:   // must be called before calling withinIncludingScrolloffset, every time the
rlm@46:   // page is scrolled
rlm@46:   prepare: function() {
rlm@46:     this.deltaX =  window.pageXOffset
rlm@46:                 || document.documentElement.scrollLeft
rlm@46:                 || document.body.scrollLeft
rlm@46:                 || 0;
rlm@46:     this.deltaY =  window.pageYOffset
rlm@46:                 || document.documentElement.scrollTop
rlm@46:                 || document.body.scrollTop
rlm@46:                 || 0;
rlm@46:   },
rlm@46: 
rlm@46:   realOffset: function(element) {
rlm@46:     var valueT = 0, valueL = 0;
rlm@46:     do {
rlm@46:       valueT += element.scrollTop  || 0;
rlm@46:       valueL += element.scrollLeft || 0;
rlm@46:       element = element.parentNode;
rlm@46:     } while (element);
rlm@46:     return [valueL, valueT];
rlm@46:   },
rlm@46: 
rlm@46:   cumulativeOffset: function(element) {
rlm@46:     var valueT = 0, valueL = 0;
rlm@46:     do {
rlm@46:       valueT += element.offsetTop  || 0;
rlm@46:       valueL += element.offsetLeft || 0;
rlm@46:       element = element.offsetParent;
rlm@46:     } while (element);
rlm@46:     return [valueL, valueT];
rlm@46:   },
rlm@46: 
rlm@46:   positionedOffset: function(element) {
rlm@46:     var valueT = 0, valueL = 0;
rlm@46:     do {
rlm@46:       valueT += element.offsetTop  || 0;
rlm@46:       valueL += element.offsetLeft || 0;
rlm@46:       element = element.offsetParent;
rlm@46:       if (element) {
rlm@46:         p = Element.getStyle(element, 'position');
rlm@46:         if (p == 'relative' || p == 'absolute') break;
rlm@46:       }
rlm@46:     } while (element);
rlm@46:     return [valueL, valueT];
rlm@46:   },
rlm@46: 
rlm@46:   offsetParent: function(element) {
rlm@46:     if (element.offsetParent) return element.offsetParent;
rlm@46:     if (element == document.body) return element;
rlm@46: 
rlm@46:     while ((element = element.parentNode) && element != document.body)
rlm@46:       if (Element.getStyle(element, 'position') != 'static')
rlm@46:         return element;
rlm@46: 
rlm@46:     return document.body;
rlm@46:   },
rlm@46: 
rlm@46:   // caches x/y coordinate pair to use with overlap
rlm@46:   within: function(element, x, y) {
rlm@46:     if (this.includeScrollOffsets)
rlm@46:       return this.withinIncludingScrolloffsets(element, x, y);
rlm@46:     this.xcomp = x;
rlm@46:     this.ycomp = y;
rlm@46:     this.offset = this.cumulativeOffset(element);
rlm@46: 
rlm@46:     return (y >= this.offset[1] &&
rlm@46:             y <  this.offset[1] + element.offsetHeight &&
rlm@46:             x >= this.offset[0] &&
rlm@46:             x <  this.offset[0] + element.offsetWidth);
rlm@46:   },
rlm@46: 
rlm@46:   withinIncludingScrolloffsets: function(element, x, y) {
rlm@46:     var offsetcache = this.realOffset(element);
rlm@46: 
rlm@46:     this.xcomp = x + offsetcache[0] - this.deltaX;
rlm@46:     this.ycomp = y + offsetcache[1] - this.deltaY;
rlm@46:     this.offset = this.cumulativeOffset(element);
rlm@46: 
rlm@46:     return (this.ycomp >= this.offset[1] &&
rlm@46:             this.ycomp <  this.offset[1] + element.offsetHeight &&
rlm@46:             this.xcomp >= this.offset[0] &&
rlm@46:             this.xcomp <  this.offset[0] + element.offsetWidth);
rlm@46:   },
rlm@46: 
rlm@46:   // within must be called directly before
rlm@46:   overlap: function(mode, element) {
rlm@46:     if (!mode) return 0;
rlm@46:     if (mode == 'vertical')
rlm@46:       return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
rlm@46:         element.offsetHeight;
rlm@46:     if (mode == 'horizontal')
rlm@46:       return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
rlm@46:         element.offsetWidth;
rlm@46:   },
rlm@46: 
rlm@46:   clone: function(source, target) {
rlm@46:     source = $(source);
rlm@46:     target = $(target);
rlm@46:     target.style.position = 'absolute';
rlm@46:     var offsets = this.cumulativeOffset(source);
rlm@46:     target.style.top    = offsets[1] + 'px';
rlm@46:     target.style.left   = offsets[0] + 'px';
rlm@46:     target.style.width  = source.offsetWidth + 'px';
rlm@46:     target.style.height = source.offsetHeight + 'px';
rlm@46:   },
rlm@46: 
rlm@46:   page: function(forElement) {
rlm@46:     var valueT = 0, valueL = 0;
rlm@46: 
rlm@46:     var element = forElement;
rlm@46:     do {
rlm@46:       valueT += element.offsetTop  || 0;
rlm@46:       valueL += element.offsetLeft || 0;
rlm@46: 
rlm@46:       // Safari fix
rlm@46:       if (element.offsetParent==document.body)
rlm@46:         if (Element.getStyle(element,'position')=='absolute') break;
rlm@46: 
rlm@46:     } while (element = element.offsetParent);
rlm@46: 
rlm@46:     element = forElement;
rlm@46:     do {
rlm@46:       valueT -= element.scrollTop  || 0;
rlm@46:       valueL -= element.scrollLeft || 0;
rlm@46:     } while (element = element.parentNode);
rlm@46: 
rlm@46:     return [valueL, valueT];
rlm@46:   },
rlm@46: 
rlm@46:   clone: function(source, target) {
rlm@46:     var options = Object.extend({
rlm@46:       setLeft:    true,
rlm@46:       setTop:     true,
rlm@46:       setWidth:   true,
rlm@46:       setHeight:  true,
rlm@46:       offsetTop:  0,
rlm@46:       offsetLeft: 0
rlm@46:     }, arguments[2] || {})
rlm@46: 
rlm@46:     // find page position of source
rlm@46:     source = $(source);
rlm@46:     var p = Position.page(source);
rlm@46: 
rlm@46:     // find coordinate system to use
rlm@46:     target = $(target);
rlm@46:     var delta = [0, 0];
rlm@46:     var parent = null;
rlm@46:     // delta [0,0] will do fine with position: fixed elements,
rlm@46:     // position:absolute needs offsetParent deltas
rlm@46:     if (Element.getStyle(target,'position') == 'absolute') {
rlm@46:       parent = Position.offsetParent(target);
rlm@46:       delta = Position.page(parent);
rlm@46:     }
rlm@46: 
rlm@46:     // correct by body offsets (fixes Safari)
rlm@46:     if (parent == document.body) {
rlm@46:       delta[0] -= document.body.offsetLeft;
rlm@46:       delta[1] -= document.body.offsetTop;
rlm@46:     }
rlm@46: 
rlm@46:     // set position
rlm@46:     if(options.setLeft)   target.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
rlm@46:     if(options.setTop)    target.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
rlm@46:     if(options.setWidth)  target.style.width = source.offsetWidth + 'px';
rlm@46:     if(options.setHeight) target.style.height = source.offsetHeight + 'px';
rlm@46:   },
rlm@46: 
rlm@46:   absolutize: function(element) {
rlm@46:     element = $(element);
rlm@46:     if (element.style.position == 'absolute') return;
rlm@46:     Position.prepare();
rlm@46: 
rlm@46:     var offsets = Position.positionedOffset(element);
rlm@46:     var top     = offsets[1];
rlm@46:     var left    = offsets[0];
rlm@46:     var width   = element.clientWidth;
rlm@46:     var height  = element.clientHeight;
rlm@46: 
rlm@46:     element._originalLeft   = left - parseFloat(element.style.left  || 0);
rlm@46:     element._originalTop    = top  - parseFloat(element.style.top || 0);
rlm@46:     element._originalWidth  = element.style.width;
rlm@46:     element._originalHeight = element.style.height;
rlm@46: 
rlm@46:     element.style.position = 'absolute';
rlm@46:     element.style.top    = top + 'px';;
rlm@46:     element.style.left   = left + 'px';;
rlm@46:     element.style.width  = width + 'px';;
rlm@46:     element.style.height = height + 'px';;
rlm@46:   },
rlm@46: 
rlm@46:   relativize: function(element) {
rlm@46:     element = $(element);
rlm@46:     if (element.style.position == 'relative') return;
rlm@46:     Position.prepare();
rlm@46: 
rlm@46:     element.style.position = 'relative';
rlm@46:     var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
rlm@46:     var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
rlm@46: 
rlm@46:     element.style.top    = top + 'px';
rlm@46:     element.style.left   = left + 'px';
rlm@46:     element.style.height = element._originalHeight;
rlm@46:     element.style.width  = element._originalWidth;
rlm@46:   }
rlm@46: }
rlm@46: 
rlm@46: // Safari returns margins on body which is incorrect if the child is absolutely
rlm@46: // positioned.  For performance reasons, redefine Position.cumulativeOffset for
rlm@46: // KHTML/WebKit only.
rlm@46: if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
rlm@46:   Position.cumulativeOffset = function(element) {
rlm@46:     var valueT = 0, valueL = 0;
rlm@46:     do {
rlm@46:       valueT += element.offsetTop  || 0;
rlm@46:       valueL += element.offsetLeft || 0;
rlm@46:       if (element.offsetParent == document.body)
rlm@46:         if (Element.getStyle(element, 'position') == 'absolute') break;
rlm@46: 
rlm@46:       element = element.offsetParent;
rlm@46:     } while (element);
rlm@46: 
rlm@46:     return [valueL, valueT];
rlm@46:   }
rlm@46: }